So I found a few oddities while turning girls into Scarecrows using the Harvest Icon:
1. After I use it on Liliana, I can't use it on anyone else.
2. After I turned LW into a Scarecrow, I went to Verona's bar to assign Samona as a Server, but the girl that became a Server was the LW. I don't know if this has to do with Samona being at the bottom of the list.
3. When I turned Jyla and Nuan into Scarecrows, using Colossus caused both of them to use Colossus as well as if they were Faceless Maids.
I'm pretty sure I came across some big bugs, but until it's fixed I'm gonna exploit the hell out of it
As long as we're being honest about bugs that benefit the player enormously, I'll share some I found.
Soulgem gear can be duplicated by equipping them to characters that are
not in your active four party slots, then fighting a battle. After the fight, the game will examine your inventory and main four characters' equipment... it'll notice the soulgem gear is "missing," and spawn new copies into your inventory as a failsafe. So you can generate copies of each soulgem sword or soulgem ring for the rest of your party minus three. (I like to duplicate the Lost Wizard's Soulgem Ring for its +100% EXP. ...And have her as a Skull-Masked Zombie so she can even learn some Combat skills while my party is all wearing her soul.) When you finally want to put the gear back into soulgem form, all copies are removed from your inventory and you get only one soulgem back. It's probably for the best that it prevents any further weirdness in that way.
If you equip a Sentient Frame to a Puppet, then close and reopen the menu (to confirm the form change) and remove it or swap it for a different Frame... the Puppet will
retain its Sentient skillset even though it is no longer Sentient. This will persist until the next time you heal at a Restore Point.
This means
1) You can have Magic or Combat on a Puppet without using a Magus/Healing/Warrior Core, if that character's default class had access to it. And
2) an Alisha Puppet can use Tech, an Annie Puppet can use her usual wide variety of Spell Bullets in the Combat menu (plus the Puppet Shot in her Puppet menu), and a Puppet Jyla can use Steal. ...Even with Asura Frames on.